Evaluation of the CO 2 sequestration capacity for coal fly ash using a flow-through column reactor under ambient conditions

Ho Young Jo, Joon Hoon Ahn, Hwanju Jo

Research output: Contribution to journalArticle

15 Citations (Scopus)


An in-situ CO 2 sequestration method using coal ash ponds located in coastal regions is proposed. The CO 2 sequestration capacity of coal fly ash (CFA) by mineral carbonation was evaluated in a flow-through column reactor under various conditions (solid dosage: 100-330g/L, CO 2 flow rate: 20-80mL/min, solvent type: deionized (DI) water, 1M NH 4Cl solution, and seawater). The CO 2 sequestration tests were conducted on CFA slurries using flow-through column reactors to simulate more realistic flow-through conditions. The CO 2 sequestration capacity increased when the solid dosage was increased, whereas it was affected insignificantly by the CO 2 flow rate. A 1M NH 4Cl solution was the most effective solvent, but it was not significantly different from DI water or seawater. The CO 2 sequestration capacity of CFA under the flow-through conditions was approximately 0.019g CO 2/g CFA under the test conditions (solid dosage: 333g/L, CO 2 flow rate: 40mL/min, and solvent: seawater).

Original languageEnglish
Pages (from-to)127-136
Number of pages10
JournalJournal of Hazardous Materials
Publication statusPublished - 2012 Nov 30



  • Aqueous mineral carbonation
  • CO
  • Coal fly ash
  • Flow-through column reactor
  • Sequestration

ASJC Scopus subject areas

  • Health, Toxicology and Mutagenesis
  • Pollution
  • Waste Management and Disposal
  • Environmental Chemistry
  • Environmental Engineering

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